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<p>Restoration of urban degraded land and long-term maintenance of soil quality of urban green space through plantation is a global challenge. The present investigation was undertaken to study the impact of plantation of two multipurpose shrub plants viz. <i>Hibiscus rosa-sinensis (</i>HR) and <i>Nyctanthes arbor-tristis</i> (NA), cultivated on urban degraded bare land (BL) in the dry tropics on major soil properties. HR was shorter in height (2.2&#xa0;m) as compared to NA (3.5&#xa0;m), yet had larger girth (HR,0.13&#xa0;m; NA,0.11&#xa0;m) with an elaborate root system and leaf litter having higher C/N (HR, 39; NA, 24) and Lignin/N (HR, 15.83; NA, 11.7) ratios. Among three land uses, at upper (0–10&#xa0;cm) and lower (10–20&#xa0;cm) soil depths, the contents of soil organic carbon (SOC), water holding capacity (WHC), bulk density (BD), porosity (PO), and microbial biomass carbon (MBC) level, were highest in HR, whereas total soil nitrogen (TN) and the microbial biomass nitrogen (MBN) were highest in NA and lowest in BL. Through the soil profile, the proportion of macro- and meso-aggregate followed the trend i.e., HR &gt; NA &gt; BL whereas the trend was reversed for micro aggregate proportion. Contents of SOC and soil C stock at the upper soil layer were found to be strongly correlated with WHC, MBC, MBN, PO, soil macro-, and meso-aggregates as also evidenced by the principal component analysis (PCA). Conclusively, it may be suggested that both the multipurpose shrubs, especially HR, significantly improved the soil quality and thus can be used as the potential species for an efficient, resilient, and sustainable management strategy for the restoration of urban degraded land in the dry tropics.</p>

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Restoration of urban degraded soil in the dry tropics: role of multipurpose shrub plants

  • 期刊论文

  • 发表日期：

    2025年12月5日

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  • Amrita Kumari,
  • Priyanka Soni,
  • Fahami Zaya,
  • Rahul Kumar,
  • Riya Gupta,
  • Nandita Ghoshal

摘要

Restoration of urban degraded land and long-term maintenance of soil quality of urban green space through plantation is a global challenge. The present investigation was undertaken to study the impact of plantation of two multipurpose shrub plants viz. Hibiscus rosa-sinensis (HR) and Nyctanthes arbor-tristis (NA), cultivated on urban degraded bare land (BL) in the dry tropics on major soil properties. HR was shorter in height (2.2 m) as compared to NA (3.5 m), yet had larger girth (HR,0.13 m; NA,0.11 m) with an elaborate root system and leaf litter having higher C/N (HR, 39; NA, 24) and Lignin/N (HR, 15.83; NA, 11.7) ratios. Among three land uses, at upper (0–10 cm) and lower (10–20 cm) soil depths, the contents of soil organic carbon (SOC), water holding capacity (WHC), bulk density (BD), porosity (PO), and microbial biomass carbon (MBC) level, were highest in HR, whereas total soil nitrogen (TN) and the microbial biomass nitrogen (MBN) were highest in NA and lowest in BL. Through the soil profile, the proportion of macro- and meso-aggregate followed the trend i.e., HR > NA > BL whereas the trend was reversed for micro aggregate proportion. Contents of SOC and soil C stock at the upper soil layer were found to be strongly correlated with WHC, MBC, MBN, PO, soil macro-, and meso-aggregates as also evidenced by the principal component analysis (PCA). Conclusively, it may be suggested that both the multipurpose shrubs, especially HR, significantly improved the soil quality and thus can be used as the potential species for an efficient, resilient, and sustainable management strategy for the restoration of urban degraded land in the dry tropics.